#55377D
Closest named color: Dark Slate Blue (#483D8B). oklch(40.7% 0.115 301.2), rgb(85, 55, 125).
Aa
White text reads best on this color (9.42:1).
About this color
#55377D is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.115 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.034 away. White text reads best on it, at 9.42:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.115) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.22:1 |
| White text | 9.42:1 |
Values
| HEX | #55377D |
| RGB | rgb(85, 55, 125) |
| HSL | hsl(266, 39%, 35%) |
| OKLCH | oklch(40.7% 0.115 301.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #55377D | 9.42:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #55377D | 2.22:1 | Fails | Lc 12.4 | Not readable |
| #55377D text on white | 9.42:1 | AAA | Lc 91.5 | Preferred for body text |
| #55377D text on black | 2.22:1 | Fails | Lc -10.8 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#ECE7F5
oklch(93.6% 0.019 302.2)
-
Step 200
200
#DDD4EF
oklch(88.5% 0.038 300.8)
-
Step 300
300
#C8B7E6
oklch(80.9% 0.068 301.4)
-
Step 400
400
#AC90D9
oklch(70.6% 0.108 301.3)
-
Step 500
500
#9873CF
oklch(63% 0.139 301.1)
-
Step 600
600
#835ABC
oklch(55.6% 0.15 301)
-
Step 700
700
#6F49A2
oklch(49% 0.14 301.1)
-
Step 800
800 (this color)
#55377D
oklch(40.7% 0.115 301.2)
-
Step 900
900
#4A3469
oklch(37.6% 0.09 301.3)
-
Step 950
950
#2B1F3E
oklch(27% 0.058 300.4)
#55377D with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #1D467F | 0.084 |
| Deuteranopia (no green cones) | #26467B | 0.077 |
| Tritanopia (no blue cones) | #4D4554 | 0.089 |
| Achromatopsia (no color) | #464646 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55377D
#55377D
oklch(40.7% 0.115 301.2)
- #425100
#425100
oklch(40.7% 0.098 121.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #55377D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.034
- Blueberry #464196 ΔE 0.051
- Rebecca Purple #663399 ΔE 0.056
- Twilight #4E518B ΔE 0.069
- Dusk #4E5481 ΔE 0.078
- Cobalt #1E488F ΔE 0.086
- Dusk Blue #26538D ΔE 0.093
- Indigo #4B0082 ΔE 0.093
Use #55377D in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.